1. Department of Economics and Informatics, Federal Rural University of Pernambuco, Serra Talhada, PE 56909-535, Brazil
2. Federal Institute of Education, Science and Technology of Paraíba, Campus Patos PB. Acesso Rodovia PB 110, S/N Alto Tubiba – CEP: 58700-030, PB, Patos, Brazil
3. Department of Statistics and Informatics, Federal Rural University of Pernambuco, Rua Dom Manuel de Medeiros, S/N Dois Irmãos – CEP: 52171-900, PE, Recife, Brazil
4. School of Public Policy and Government, Getulio Vargas Foundation, Brasilia, DF, Brazil